Sin Permiso. República y socialismo, también para el siglo XXI (Without permission: Republic and Socialism also for the 21st century) is an international political magazine.

Sin Permiso is published every six months, but its webpage is updated weekly. It covers a wide range of topics (politics, economy, philosophy, feminism, ecology, basic income and culture) mainly from Europe, United States of America and South-America.

Sin Permiso was launched in May 2006 by a small group of socialists --understood in a wide sense of the term, namely people coming from the labour movement, social democracy, communism, anarchism and tradeunionism-- which has been growing since then.

The name of the magazine comes from an excerpt of the Karl Marx's Critique of the Gotha Program: